in dayton tuesday romney hammered mr. obama on taxes. >> one idea, i admit, one thing he did not do in his first four years which he said he'll do in the next four years and that's to raise taxes. anybody here who thinks raising taxes will help grow the economy. >> reporter: no. >> reporter: the attack over taxes is a change for romney who has often accused the president of raising taxes in his first term. romney is looking to jump start his campaign with a good performance in the first debate one week from today. the man who plays mr. obama in mr. romney's mock sessions though tried to lower expectations playing up the president's experience. >> he's been through a lot of those one-on-one debates with a republican. mitt has not, and you think about it, he hasn't had a real debate in ten years because these republican debates tend to be more like candidate forums. >> reporter: tuesday the poet candidates both made whirlwind visits to new york city. president obama addressed the u.n. general assembly, appearing to draw a r